Speaker box



FIG. 1 is a front, top, right perspective view of a speaker box showing my new design;

FIG. 2 is a rear, top, left perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a right side elevational view thereof.

Portions in broken lines are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for a speaker box, as shown and described. 